21.7 mol Rn =
Rn atoms
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130.68 × 10²³ atoms

Explanation:

Given data:

Number of moles of Rn = 21.7 mol

Number of atoms = ?

Solution:

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

21.7 mol × 6.022 × 10²³ atoms / 1mol

130.68 × 10²³ atoms

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.